Degradable polymer composition for use in downhole tools and method of manufacturing
US11566097B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 13, 2020 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Oct 24, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2230/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A chemical composition for a degradable polymeric material includes an isocyanate terminated polyester prepolymer, including prepolymer units as a main chain with a plurality of isocyanates at ends of the main chain, and a cross-linking agent. The isocyanate terminated polyester prepolymer has a structural formula as follows: wherein R, R′ and R″ are an aryl group or alkyl group and wherein n is a number of prepolymer units corresponding to length of the main chain. The composition degrades at a rate and at a delay depending on temperature and the composition for a component of a downhole tool. The composition has strength and elasticity for a component of a downhole tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.